Troubleshooting SiBE04-809
86 Service Diagnosis
4.8 Signal Transmission Error (between Indoor Unit and
Wired Remote Controller)
Remote
Controller
Display
U5
Method of
Malfunction
Detection
The data received from the indoor unit in indoor unit-wired remote controller signal transmission
is checked whether it is normal.
Malfunction
Decision
Conditions
When the data sent from the indoor unit cannot be received normally, or when the content of the
data is abnormal.
Supposed
Causes
Faulty remote controller cable
Faulty remote controller
Troubleshooting
Check the indoor unit-remote
controller connection wires.
Is it normal?
YES
NO
(R8420)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Replace the remote
controller cable.
Replace the remote
controller or the indoor
unit PCB.
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